msorenso- The case body of the 600 JDJ is a little
smaller than 600NE, but bullet diameter is the same.
Yes in a #1, the 600 JDJ is one to use, but not only
one.The 600 OK that a bunch of guys on AR
developed would work also, giving the same or more power. It is a belted straight case, whereas the
600JDJ,600NE,577NE are rimmed straight cases.Ed